Hello, Here is how to sync your firefox account : #Open Settings: Click the menu button (☰) in the top-right corner of the browser and click Settings (or Preferences). #Sign In: Click on Sync in the left-hand panel, then click Sign in to Sync. #Create/Login Account: Use your email and password to create a new Firefox account or sign in to an existing one. #Configure Data: Choose what to sync e.g.(bookmarks, history, passwords, open tabs, add-ons, and settings) by checking the boxes in the Sync panel.